Show HN: Yulin Local AWS Simulator

For the last few months I've been working on Yulin, which is an AWS simulator for Node.js. It simulates AWS services and state in memory in the same single process as your tests, and can also serve the simulation on localhost for local dev. It's in a similar conceptual space to LocalStack, but takes a very different approach by avoiding containers and keeping everything together in one process that you can step through in a debugger.